Mathematics Circles

What is the equation of a circle whose radius is 4 and which is concentric with the circle x² + y² + 2x − 6y = 0?

1

x² + y² + 6x − 2y + 6 = 0

2

x² + y² − 2x + 6y = 0

3

x² + y² + 2x − 6y − 6 = 0

4

x² + y²+ 2x + 6y + 6 = 0

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